Problem
Research questions and friction points this paper is trying to address.
Non-Terrestrial Networks
Holographic MIMO
Energy Efficiency
IMT-2030
RF Chain
Advanced Holographic Multi-Antenna Solutions for Global Non-Terrestrial Network Integration in IMT-2030 Systems
🤖 AI Summary
This study addresses the excessive energy consumption of conventional MIMO systems in low Earth orbit satellite communications, which stems from the large number of radio frequency (RF) chains. Targeting the integrated space-air-ground networks envisioned for IMT-2030, this work presents the first systematic investigation into the applicability of holographic MIMO in non-terrestrial scenarios. By leveraging impedance modulation over a continuous aperture surface, the proposed approach enables highly efficient beamforming while drastically reducing the number of RF chains. This design maintains multi-user link capacity and reliability yet achieves substantial power savings. The work thus overcomes the high-energy bottleneck inherent in traditional MIMO architectures and offers a viable pathway toward green, energy-efficient onboard satellite communications.
📝 Abstract
Sixth-generation (6G) networks are expected to provide ubiquitous connectivity across terrestrial and non-terrestrial domains. This will be possible by integrating non-terrestrial networks (NTNs) to extend coverage to underserved areas. Antennas are central to this vision, with multiple-input multiple-output (MIMO) technologies receiving the most attention due to their ability to exploit spatial multiplexing to improve link capacity and reliability. However, conventional MIMO can consume significant energy, as each antenna element typically requires an independent RF chain. This limitation is particularly critical in non-terrestrial systems, where onboard energy resources are limited. Holographic MIMO (HMIMO) has emerged as a promising alternative in this context. These systems are based on theoretically continuous apertures, where radiation is generated through controlled modulation of surface impedance. This enables beamforming mechanisms with significantly fewer RF chains, reducing power consumption. In this work, we make the case for HMIMO as a suitable candidate for NTN integration within IMT-2030 systems. We discuss its advantages over conventional MIMO and present a case study of HMIMO integration in LEO-based multi-user communication.
Innovation
Methods, ideas, or system contributions that make the work stand out.
Holographic MIMO
Non-Terrestrial Networks
IMT-2030
Energy Efficiency
Beamforming
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